How to change the path to php.ini in PHP CLI version

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Per http://php.net/configuration.file:

php.ini is searched for in these locations (in order):

  • SAPI module specific location (PHPIniDir directive in Apache 2, -c command line option in CGI and CLI, php_ini parameter in NSAPI, PHP_INI_PATH environment variable in THTTPD)
  • The PHPRC environment variable. Before PHP 5.2.0, this was checked after the registry key mentioned below.
  • As of PHP 5.2.0, the location of the php.ini file can be set for different versions of PHP. The following registry keys are examined in order:
    • [HKEY_LOCAL_MACHINE\SOFTWARE\PHP\x.y.z], [HKEY_LOCAL_MACHINE\SOFTWARE\PHP\x.y] and [HKEY_LOCAL_MACHINE\SOFTWARE\PHP\x], where x, y and z mean the PHP major, minor and release versions. If there is a value for IniFilePath in any of these keys, the first one found will be used as the location of the php.ini (Windows only).
    • [HKEY_LOCAL_MACHINE\SOFTWARE\PHP], value of IniFilePath (Windows only).
  • Current working directory (except CLI).
  • The web server’s directory (for SAPI modules), or directory of PHP (otherwise in Windows).
  • Windows directory (C:\windows or C:\winnt) (for Windows), or –with-config-file-path compile time option.

For CLI, your best bet is probably either to set the $PHPRC environment variable for the account that will be executing scripts, or recompile PHP with a different --with-config-file-path configuration setting.

You can also override the php.ini search dir on a per-execution basis by specifying the -c option when invoking PHP:

> php --help
Usage: php [options] [-f]  [--] [args...]
...
  -c | Look for php.ini file in this directory

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